15 How is it nasty? They slept together and they are not related. You also have a stupid point. You say there is no one else in the world but each other like it is a bad thing and say that it is lustful? That's not lust if you stay with one person, it is love.

"your telling me there was no one else in the world but each other??? "

You know, you can say this sentence to every loving couple in the world. And yes, there are other people in this world (even a little bit too many), but if you love eachother/just want sex with eachother, nobody gives a shit about all the other possible candidates. Love or lust, they are not blood-related, so they can do with eachother what they want - imo even blood-related people can do that, as long as they don't start thinking of procreating.

No. I think most of us are mature enough to realize that sex between consenting adults doesn't "magically" become gross just because two OTHER adults entered into a social and legal pact. Or would you break up with your significant other if anyone else just said "Poof! This is now gross and frowned on for no real reason anyone can explain! You have to break up now!"